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05-23-2015, 05:53 AM
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#1
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Member
Join Date: Jun 2014
Location: Owosso, MI
Posts: 34
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Another tire pressure TPMS question
I just installed TST 507 on rig. 6 + 2 on tow dolly.
After I installed everything it showed my pressures on the coach at 92-96 psi. I aired all coach tires up to 102 psi. three gauges confirmed. Air chuck gauge, air gauge, and regulator on compressor. Once on the way, the air pressure on all 6 coach tires was reading 109-115 on TST. Is this normal for a 10% or greater increase with warm up? The dolly tires were set to 50 psi (all three gauges} and when on way were reading 49 and 52 on the TST.
Any input appreciated.
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2000 Damon Intruder 351
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05-23-2015, 05:55 AM
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#2
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Community Administrator
Join Date: Aug 2009
Posts: 53,378
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I found that % increase as well and confirmed with TST that is was normal.
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Cliff,Tallulah and Buddy ( 1999-2012 )
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05-23-2015, 06:01 AM
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#3
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Senior Member
Forest River Owners Club Ford Super Duty Owner
Join Date: Nov 2012
Location: Western NY
Posts: 164
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Yes you will see the tire pressures increase as you are driving. If you watch the system say first thing in the morning and later in the day when the sun is hitting the tires, you can see the same thing happen. Ours are set at 92 psi on all tires and reading of 110-115 psi were seen during a trip to FL when it was 95-90 degrees. During January when it was 0-5 degrees say reading down to 80 psi. First nice day and back at the 92 psi readings.
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05-23-2015, 08:28 AM
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#4
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Senior Member
Winnebago Owners Club Freightliner Owners Club
Join Date: Sep 2012
Location: CO
Posts: 928
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I'm not sure with that TST model if it includes a temperature reading for each tire or not. If it does, watch the temperature readings. As the temperature rises, so will the air pressure...
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Colorado '15 Winnebago Forza 34T w/MKZ hybrid toad '20 Jeep Cherokee Trailhawk toad
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05-23-2015, 08:45 AM
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#5
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Senior Member
Winnebago Owners Club Freightliner Owners Club
Join Date: Jun 2013
Location: 5 miles south of Lakeville, Mn
Posts: 3,046
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Yes, perfectly normal.
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Jim and Carol Cooper with Oreo the Kitty
FAA ATC ret, VFW, AL, VVA, NRA
US Army Aviation, MACV Vietnam 65-66
2012 Journey 36M, Cummings 360hp
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05-23-2015, 09:10 AM
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#6
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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Normal. You may need to set your warning alarm levels differing from the stock defaults if you are getting false alarms sometimes.
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Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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05-23-2015, 09:17 AM
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#7
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Community Administrator
Join Date: Aug 2009
Posts: 53,378
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Quote:
Originally Posted by vsheetz
Normal. You may need to set your warning alarm levels differing from the stock defaults if you are getting false alarms sometimes.
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Excellent point.
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Cliff,Tallulah and Buddy ( 1999-2012 )
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05-23-2015, 11:19 AM
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#8
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Senior Member
Fleetwood Owners Club Freightliner Owners Club
Join Date: Sep 2012
Location: WI
Posts: 279
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Left home yesterday with tires set at 95 psi for rears. After an hour of driving @70° pressure was up to 115 and high pressure alarm was going off. Totally normal.
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2013 Fleetwood Discovery 40G / 2012 GMC Acadia
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05-23-2015, 03:28 PM
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#9
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Senior Member
Join Date: Mar 2007
Location: Apex, NC
Posts: 1,857
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It is normal. I set my high pressure warning to 25% higher than cold inflation pressure. I'm not concerned about high pressure. Low pressure really concerns me.
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2010 Winnebago Journey Express 34Y
2010 Freightliner XCS (mfd 9/'09)
'07 Saturn Vue V6
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05-24-2015, 02:21 AM
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#10
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Sep 2007
Posts: 2,976
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I have the Tst system on 6 Moho tires. the low pressure alarm is set at 85 psi. 95 psi is normal.
if I install sensors on my toad with 40 psi normal how do I set the alarm?
obviously, I do not want a low pressure alarm at 40 psi for all 10 tires.
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01 WINNEBAGO 35U W20.8.1L 5sp allison SW Wa,. Good Sam, SKP. RVM 198 AMSOIL fluids. BANKS ecm program. SCAN GAUGE II w/ Ally temp. 2 LIFELINE GPL-6CT AGM Batts on their sides. Michelins, TST tptts. K&N panel air filter. AERO mufflers. TAYLOR plug wires. ULTRA POWER track bar. KONI fsd shocks, toad '21MB GLA FWD on dolly
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05-24-2015, 04:43 AM
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#11
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Senior Member
Join Date: Jul 2014
Posts: 1,535
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We are in the same situation, we need to raise our high-pressure alarm because the settings suggested by TST cause the alarm to go off after an hour or so of travel. Yet the temperature is not a significant concern in that rise in PSI from our experience thus far.
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Taking in the sights with our Trolley ...but life is always better under a Palm Tree
2019 Jayco Embark (Entegra) 39T2. - our Trolley
2019Jeep Cherokee Latitude, Western New York
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05-24-2015, 05:01 AM
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#12
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Senior Member
Tiffin Owners Club
Join Date: Sep 2012
Location: Maryland
Posts: 1,432
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Quote:
Originally Posted by DAN L
I have the Tst system on 6 Moho tires. the low pressure alarm is set at 85 psi. 95 psi is normal.
if I install sensors on my toad with 40 psi normal how do I set the alarm?
obviously, I do not want a low pressure alarm at 40 psi for all 10 tires.
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You actually set the alarm for each tire as you program the system so each tire has it's own alarm settings.
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05-24-2015, 08:54 AM
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#13
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Senior Member
Join Date: Mar 2007
Location: Apex, NC
Posts: 1,857
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Actually you set the pressure alarms by axle.
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2010 Winnebago Journey Express 34Y
2010 Freightliner XCS (mfd 9/'09)
'07 Saturn Vue V6
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05-24-2015, 09:08 AM
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#14
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Senior Member
Join Date: Aug 2010
Posts: 2,772
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Yes but you have to set EACH sensor separately.
Sent from my iPhone using iRV2 - RV Forum
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Terry & Alice
2006 Bounder 38L DP
2012 GMC Terrain
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